Air-brake-venting speed-controlling mechanism



April s, 1924. 1,489,642

A. B. KENDALL AIR BRAKEVENTING SPEED coNTRoLLlNG MECHANISM Patented Apr.8, 1924.

vn-Nital) fPArENT oFFlci-z.,

A11-wirrT n; KENDALL; or.-MAYWeon;rnmnorsinssenonTo-RneAN-snrn'rnnnvrons COMPANY, :ING A'ffoonroRA'rfoNffoF NEWl YORK.

AIRTBRAKEWENTIG' srEEn-'CONTROLLING i/iE'cHAIsM. Y

Application. med' May 5,"

To all whom t may concern.'

Be it'know'n thatI,AnLnN 'Bf KENALL, a citizen of the UnitedStates,residing at Maywood,in the YcountyA of Cookand State "of Illinois, haveinvented' certain new and' 'useful Improvementsij 1n AlrBrake-VentnigSpeed-Controlling Mechanism, of W'h'iclil the following isaspeciication, referencev beingA had therein tothe'accompanying'draivi'ng.

`This invention relates to improvements in' speedcontrolling meansemployed' 'for lexample to co'ntr'olthe speed of trains', ,one objectof'the invention being' the provision of a simple device? in lwhichac'entifugally'rop- 15 erated meansdire'ctly ventslthefair pressure pipeof an airbrake' system-'sothat the train Will'be 'held at apredetermined'speed.

furtherobject ofithisinvention 'comprehends the 'provision fofl a simplemeans for controlling the'v speed offtheitrain .should "thesamebe-moving'faster than a predetermined or permissive' speed, lwhich means can i be"readily attached Ain, vp'o'sltion]Without 1n -ratus onl the locomotiveor the cars of a train,

as for examplebyLattaohing'the same tothe ivheel 'of acaror locomotive,

the'track or roadWayforproduc'ing alspeed controlling "effect l'onlthevehicle.

' 'Y The ligure illustrates ai diagrammatic view 1 vof the apparatusWithparts in section, showing the Ioperation of the same.

" Referring nowgmorein detail tov the drawlings, the invention'in one ofits "aspects-includes the provision of speraedrcontrol, means hicle forVoperation combined withmechavnlsm operable under awarnlng orcautlonarytion, a speed controleffect on-lthe `vehicle beingtherefore producedupon concurrence A still furtherobject of the invention rcomj f prehendsthe provision of vehicle `controlling `y apparatus responsive totheconcurrence of 'an-fexcessivefspeed condition offthe. y.vehicle anda'warning or 'cautionary .conditionaonj To the *accomplishment 4'oftheforegoingv and such other objects as may' hereinafter for conditioningthe braking system of a ve- 1921K serial Nd. "467,071,

of an excessive vehiclespeed condition and p a Warning" track condition.'llo acc'onffp'lish this, the invention' 'more specificallyA .com-

prises a speed control means generally desig- 'natedas A operable under'speed'conditons' for "venting ai Huid duct connectedto theairbrake'system, and provisions 'generally' design'atedzas' B normally'closing communication between the air brake'sy'stemflandfthe con-'itrol means A andresponsive--to afcautionary ltrack conditionforl'opening-such communication. A Y

- The/speed control meansA is preferably of thelcentrifugally actuatedvlty'pe, landin the preferred construction the speed control `means isdirectlyattachedlto, a car Wheel 1 so as to beV rotatable'therevvith.Thespeed ycontrol means-A includes a back plate-2 'which isattachedtothe outer'face of the car Wheel 1,. a casing, and a removableyouter cap e, the louter cap aand the plate 2Ycarryingf lthe',V operatedparts of.l the. speed 'controllerthe main part of thepresentrconstrucy.tion being j shown. in .the -copending application ofArchibald'G Shaver' Ser. No. 303,191,

:filed lune 10,119.19. Y Y s Mountedonfthe outer cap 4 there is providedaball'. bearing freceiving' thel innery ,bearing ring 6 of. a fixedspool orf-bushing 7,' 'the'- said bushing 'being provided' ,'With avalve seat .8. Attached'to'ithe innerflange i of the bushing 7`there^areprovided a pluralityof` rods 9,*and to Vythe said rodsfisf attachedforsl-iding movement tonfly' they valve V,carrying member 10providedfwithlthe valve head "13. For operating.. the valve -oarrying Amember .10, *there ispro'vded the, 'slidably mountedelement 12V havinga1 collaror flange 11 4rotatably?fitted in -the valve` carrying men'iberas clearly shown-'inthe drawings,` `and for operating theslidably-mounted element 12there-is provided the centrifuga-Hyoperatedarms 1 5 pivotally mounted at '16.on the rear. .plate 2, and thetoggle members 14 vconnectingthe centrifugally "operated arms 15 ftoythe element 12, the arms and. toggle members beingr normally heldin'positionas shown .inthe drawings by thefspring 17, the

tension of Which-is' adjustable bythe nuts 18. Withthisconstruction itWill-beseen thatthe casing. 3, the centrifugal armsv 15` and the YYsliding element. 12ware, rotatable withV the 'jtra'ck Ycondition forpermitting such 4,operavWheel 1, Whilethe member Tand-the valve movementfor opening and closing the valve.

Connected to the port for the valve 13 there is provided a liuid duct 19associated with the air brake system of the vehicle and connected to theprovisions B which in turn communicates with the brake pipe 24 of theair brake system, as will be detailed presently. lVith this constructionit will be seen that under speed conditions of the vehicle the speedcontrol means A in unseating the valve head V13 will vent the fluid duct19 and condition the air brakeV system for operation.

For the purpose of permitting the operation of the air brake systemunder a predetermined track condition such as a caution track condition,there is provided the control provisions B heretofore referred to, thesaid provisions being arranged between the brake pipe 24 and the iuidduct 19 and Jfunctioning for normally closing communication between thesame and for opening such communication under the predeterminedcondition. The provisions B preferably include an electromagnetic valvecomprising the casing 21 provided with the chambers 2O and 23 separatedby the partition 22, the chamber 23 communieating with the brake pipe 24and the chamber 2O communicating with the fluid duct 19, as clearlyshown in the drawings, a valve head 25 attached to a valve stem 26slidably mounted in the casing being provided for normally closingcommunication between the chambers 23 and 20. For maintaining the valvehead 25 normally closed, there is provided the electromagnet 28 havingthe armature 27 attached to the valve stem 26, the said electromagnet 28being normally energized under clear track conditions as Jfullydisclosed in the train controlling system shown in the copendingapplication of Archibald. G. Shaver Serial No.v 292,548 filed April 25,1919.

The operation of my speed control apparatus will in the main be fullyapparent from the above detailed description thereof. VIt will beapparent that under normal conditions the valve 25 is seated, as is alsothe 'valve 18, and the train 1s moving along at unlimited speed undersa-fe track conditions. Should the speed of the train exceed thepredetermined or permissive speed, the centrifugal mem'bers 15 willunseat the valve 13, but if no caution indication is received by theelectromagnet '28, the valve 25 will remain seated and the air from theair brake system will Vnot be .permitted passage through the iuid ductor pipe 19, and no speed control eiects will be produced on the train.It, however, a caution indica- -tion is received by the electromagnet 28'responsive to a caution track condition,

the valve 25 is opened and under excessive speed conditions the air willbe vented through the member 7 to set the brakes and reduce the speed ofthe train. If, however, the valve 25 is operated when the train `ismoving at a permissive speed, the valve .13 will remain closed and nocontrol effect will be produced.

Although I have shown and described my device in the preferred form, itwill be obvious that many changes and modiiications may be made in thestructure disclosed without departing Afrom the spirit of the invention,defined in the Vfollowing claims.

What I claim as new is: y

1. In combination, an air valve, an electro-pneumatic valve Jforcontrolling the passage of air thereto, and a speed control governingmeans for normally closing the air valve and for opening the same underspeed conditions.

2. In combination, an air valve, an electro-pneumatic valve forcontrolling the passage of air thereto, and a centrifugally operatedspeed control governing means for normally closing the air valve and foropening the same under speed conditions.

3. The combination with an air conduit having an outlet valve at one endthereof and an intermediate valve chamber, an electrical means forcontrolling the valve with the valve chamber, andVv a speed actuatedmeans for operating the outlet valve.

4. The combination with an air conduit having an outlet valve at one endthereof and an intermediate valve chamber, an electrical means forcontrolling the valve with the valve chamber, and a centrifugal Speedactuated means for operating the outlet valve.

5. In combination with the train pipe of an air brake system, normallyclosed speed actuated valve means for opening the train pipe toatmosphere only when a permissive speed is exceeded, and provisions forcon-` trolling the passage of air through said pipe to said means. 'Y

6. In combination with the train pipe of an air brake system, normallyclosed speed control valve means operable for venting the train pipeonly under speed conditions, and provisions intermediate the train pipeand said valve means for normally closing communication from the formerto the latter and operative for opening such communication under apredetermined track condition.

7 A vehicle control apparatus comprising a normally closed fluid ductconnected to the air brake system, normally closed speed actuated valvemeans for opening said duct only under excessive speed conditions, andprovisions normally cutting o-i passage of air through said duct and tosaid means operative under cautionary track conditions kfor opening saidpassage whereby the air brake system will be vented when the permissivespeed of the vehicle is exceeded under caution track conditions.

8. A vehicle control apparatus comprising a normally closed fiuid ductconnected to the air brake system, speed actuated valve means foropening said duct under excessive speed conditions, and electromagneticvalve means normally cutting off passage of air through said duct and tosaid means operative under cautionary track conditions for opening saidpassage whereby the air brake system will be vented when the permissivespeed o-f the vehicle is exceeded under caution track conditions.

9. In a vehicle control apparatus, a fluid duct communicating with thebraking system of the vehicle, means for normally closing said duct, andspeed actuated mechanism attached to a wheel of the vehicle foroperating said means to open said duct under speed conditions.

10. In a vehicle control apparatus, a fiuid duct communicating with thebraking system of the vehicle, a valve for normally closing said duct,and a centrifugal speed governor attached to for rotation with a wheelof the vehicle for operating said means to open said duct under rspeedconditions.

1l. In a vehicle control mechanism, in

combination, a fluid duct associated with the braking system of thevehicle, and a speed control mechanism carried by a wheel of the vehiclefor controlling the closing and opening of said duct.

12. In a vehicle control mechanism, in combination, a iiuid ductassociated with the braking system of the vehicle, and a centrifugalspeed governing means carried by a wheel of the vehicle for controllingthe'closing and opening of said duct.

passage of air through said duct to said` 14:.Y A vehicle controlapparatus comprising a normally closed fluid duct connected to the airbrake system, speed actuated means v attached to and carried by a wheelof the vehicle for opening said duct under excessive speed conditions,and provisions normallyr cutting ofi passage of air through said ductand to said means operative under cautionary track conditions foropening said passage whereby the air brake system will be vented whenthe permissive speed of the vehicle is exceeded under caution trackconditions.

15. In a vehicle control mechanism, in combination with the wheel of thevehicle, a valve, and a speed control mechanism carried by the wheel ofthe vehicle for control ling said valve.

16. In a vehicle control mechanism, in combination with a wheel of thevehicle, a centrifugal governor carried by the wheel, a casing therefor,a valve carried by the casing, the said valve being connected to theYgovernor for operation thereby. l

17. In a vehicle control mechanism, in combination with a wheel o f thevehicle, a casing attached to the wheel, a centrifugal governor attachedto the casing and rotatable therewith, a valve mounted in said casingfor rotation `relative thereto, the said valve being actuated by saidgovernor.

In testimony whereof I allix my signature.

ALLEN B. KENDALL.

